GUPPY — GULF OF PARIA. 
145 
miocene and pliocene deposit in the West Indies. The shell in 
both forms is particularly abundant in the pliocene deposit of 
Matura in Trinidad. My observations lead me to the belief 
that they are one species, and that they are adult, and not the 
immature form of any other species. And notwithstanding all 
that has been said I prefer to adhere to the name invented by 
myself ( Crassinella ) as the subgeneric name of the group, under 
Crassatella .” 
Order Veneracea. 
Petricola Lamarck. 
1 79 . 3?. ty pica, Jonas. Mollusk. Beitrag, pi. vii, f. 3. 
180. I 3 , gracilis* Desh. Proc. Zool. Soc. 1853. 
Cytherea Lamarck. 
181. C. liebraea Lam. Wood, Appendix, pi. xiii, f. 21. 
C. rubiginosa Phil. 
C. varians Hanley. Wood, Appendix, pi. xv, f. 33. 
182. C. albida, Gmelin. Wood, Appendix, pi. xv, f. 31. 
C. affinis Gmel. 
C. lieta Lam (not Linn.) 
183. O. circinata Born. Wood, J. T. Venus 24. 
184. C. convexa Say. Wood, Appendix, pi. x, f. 34. 
185. C. dione Linn. Chenu. Conch, vol. ii, f. 378, 379. 
Woodward’s figure (Man. Conch, pi. xx, f. 8) represents the 
closely-allied but quite distinguishable C. lupinaria Lesson, 
which is an inhabitant of the West Coast of America. 
Trigona Megerle. 
186. TTr. trigonella Lam. Wood, Appendix, pi. xiii, 
f. 18. 
187. Tr. mactroicles Born. Wood, Ind. Test. 
Venus 33. 
Cytherea corbicula Lam. Chenu. vol. ii, f. 385-7 
